Breaking: #108148 - CDATA sections in Fluid templates no longer removed 

See forge#108148

Description 

Previous versions of Fluid and TYPO3 removed code wrapped in <![CDATA[ ]]> from template files altogether. This meant that it was possible to use CDATA to comment out template code. This is no longer possible, since CDATA sections are now interpreted by Fluid in a different way; see Feature: #108148 - Alternative Fluid Syntax for CDATA Sections.

Impact 

<![CDATA[ ]]> can no longer be used to comment out code in Fluid template files.

Affected installations 

Installations that contain Fluid templates using <![CDATA[ ]]> to comment out code are affected. A deprecation has been written to the deprecation log since TYPO3 13.4.21 if this construct is encountered in a Fluid template during rendering.

Migration 

To comment out code in Fluid templates, the Comment ViewHelper <f:comment> should be used. Since TYPO3 v13, potential Fluid syntax errors are ignored by this ViewHelper, which allows commenting out invalid Fluid syntax safely.